/* session event callback routine: traces opening / closing sessions; sets the callbacks */
static void session_event_handler( CapEnv* env, TcpSession* sess, char event )
{
char buff[512];
switch( event )
{
case DSSL_EVENT_NEW_SESSION:
SessionToString(sess, buff);
printf( "\n=> New Session: %s", buff );
SessionSetCallback( sess, data_callback_proc, error_callback_proc, NULL, sess );
SessionSetMissingPacketCallback( sess, missing_packet_callback, MISSING_PACKET_COUNT,
MISSING_PACKET_TIMEOUT );
break;
case DSSL_EVENT_SESSION_CLOSING:
SessionToString(sess, buff);
printf( "\n<= Session closing: %s", buff );
break;
default:
fprintf( stderr, "ERROR: Unknown session event code (%d)", (int)event );
break;
}
}
// Handles session startup and teardown
static void session_event_handler(CapEnv* env, TcpSession* sess, char event)
{
char buff[512];
SessionToString(sess, buff);
FakeSessionState* mySession;
switch(event)
{
case DSSL_EVENT_NEW_SESSION:
if (config.loglevel > 0)
{
if (config.daemon)
syslog(LOG_INFO, "=> New Session: %s", buff);
else
fprintf(stderr, "\n=> New Session: %s", buff);
}
if( ( mySession = malloc( sizeof( FakeSessionState ) ) ) != NULL )
{
if( init_fake_session_state( mySession ) != -1 )
{
SessionSetCallback(sess, data_callback_proc, error_callback_proc, sess);
sess->user_data = mySession;
SessionSetMissingPacketCallback( sess, missing_packet_callback, MISSING_PACKET_COUNT,
MISSING_PACKET_TIMEOUT );
}
else
{
if (config.loglevel > 0)
{
if (config.daemon)
syslog(LOG_INFO, "error: cannot init fake session: %s", buff);
else
fprintf(stderr, "Error: cannot init fake session: %s", buff);
}
}
}
else
{
if (config.loglevel > 0)
{
if (config.daemon)
syslog(LOG_INFO, "error: cannot allocate memory for fake session: %s", buff);
else
fprintf(stderr, "Error: cannot allocate memory for fake session: %s", buff);
}
}
break;
case DSSL_EVENT_SESSION_CLOSING:
if (config.loglevel > 0)
{
// Get stats
struct pcap_stat myStats;
pcap_stats(env->pcap_adapter, &myStats);
if (config.daemon)
syslog(LOG_INFO, "<= Session closing: %s\tpkts recv: %d pkts drop: %d", buff, myStats.ps_recv, myStats.ps_drop );
else
fprintf(stderr, "\n<= Session closing: %s\tpkts recv: %d pkts drop: %d", buff, myStats.ps_recv, myStats.ps_drop );
}
// Terminate session
mySession = (FakeSessionState*)sess->user_data;
if( mySession->handshakeSent )
sendEmptyTCPSegment( mySession->ln, sess, mySession->serverSeq, mySession->clientSeq, TH_RST | TH_ACK, ePacketDirFromServer );
// Clean up libnet and fake session object
libnet_destroy( mySession->ln );
free( sess->user_data );
break;
default:
if (config.daemon)
syslog(LOG_ERR, "unknown session event code (%d).", (int)event);
else
fprintf(stderr, "ERROR: Unknown session event code (%d).\n", (int)event);
break;
}
}
